Improvement in rod-couplings for oil-wells



Z. MQGINNIS. Rod-Coupling for Oil-Well.

No. 213,919. Patented April l, 1879.

WITNESS s mvzyon:

6 zywmi/a BY ATTORNEYS.

",PETERS, PHOTO-LITHGGRAPHER, WASHINGTON, D b.

UNITED STATES PATENT OFFICE.

ZENES MGGINNIS, OF PETROLIA, PENNSYLVANIA.

IMPROVEMENT IN ROD-COUPLINGS FOR OIL-WELLS.

Specification forming part of Letters Patent No. 213,919, dated April 1,1879; application filed September 20, 1878.

To all whom it may concern:

Be it known that I, ZENES MOGINNIs, of Petrolia, in the county of Butlerand State of Pennsylvania, have invented a new and Improved Rod-Oouplingfor Oil-Wells, of which the following is a specification:

The object of my invention is to provide a means for coupling anduncoupling the suckerrods used in oil-wells from the walking-beam of thepump, so that the operation may be performed without danger and withless labor than is now required.

Heretofore the connections have been made in such a way that it wasnecessary for a workman to go up on the walking-beam to disconnect thesucker-rods when it was desired to draw them out.

The invention will first be described in connection with the drawings,and then pointed out in the claim.

In the accompanying drawings, Figure 1 is a longitudinal section of mycoupling device. Fig. 2 is a cross-section at the line w 00, Fig. 1 andFig. 8 is a cross-section at the line 3 3 Fig. 1.

Similar letters of reference indicate corresponding parts.

a. is a tube or sleeve of cylindrical shape, and with its exteriorsurface at 12 formed sixsided, so that a wrench may be applied to thesleeve for turning it. The tube a has a round hole through its centerlengthwise, which hole is enlarged at one end, and provided with aninterior thread, as seen at c. The hole is also enlarged for a shortdistance midway of the length of the tube, so as to form a shoulder, 01.

e is a short rod or spindle having a head, f, that takes against theshoulder d, and retains the rod 6 in the tube a, as shown, but permitsthe tube and rod to turn independently.

The outer and upper end of rod 6 is provided with a screw-thread toreceive the couplingnut g, that connects to the rod that is attached tothe walking beam of the pump. (Not shown.)

It is a couplingnut, connected to the sleeve a by the thread 0, andprovided with a screwthreaded recess, 2', at its opposite end forattachment to the sucker-rod, (not shown,) that enters the well. The nuth is squared at k for connection of the elevating apparatus to draw therod out of the well.

The parts being coupled together as described, when it becomes necessaryto disconnect the sucker-rod from the walking-beam a wrench will beapplied to the tube a to unscrew the tube from the nut h. Theconstruction of the parts permits this to be done, as the tube will turnupon the rod e. The parts being disconnected, the parts remainingconnected to the beam may be swung out of the way, so as not tointerfere with the subsequent operations. The recoupling may beaccomplished with equal facility.

The coupling above described saves a considerable amount of time andlabor, and renders unnecessary the perilous job of ascending thewalking-beam.

.Having thus described my invention, I claim as new and desire to secureby Letters Patent- The sucker-rod of an oil-well pump, connected with arod attached to the walkingbeam by a polygonal sleeve, a, having thread0 and shoulder d, an end-threaded rod having head f, a nut, 9, havingthreaded extension, and a nut, h, having screw at opposite end, allsubstantially as shown and described.

ZENES MCGINNIS.

Witnesses DAVID CRAWFORD, S. F. ALTIE.

